JP2948709B2 - Gas turbine equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to gas turbine equipment applied to a gas turbine plant alone, a combined cycle plant, a cogeneration plant and the like, and more particularly to a top table of a gantry on which a gas turbine device is installed. The present invention relates to gas turbine equipment suitable for preventing deformation due to heat, preventing misalignment of a gas turbine rotor, and preventing deterioration of concrete forming a gantry and a top table due to heat.

[0002]

2. Description of the Related Art As described above, gas turbine equipment is applied to a combined cycle plant, a cogeneration plant, and the like in addition to a gas turbine alone plant. Here, a combined cycle plant will be described as an example.

A combined cycle plant includes a gas turbine facility, an exhaust heat recovery boiler that generates steam using high-temperature exhaust gas exhausted from the gas turbine facility, and the steam generated from the exhaust heat recovery boiler is rotated. The steam turbine equipment for conversion and a generator for converting this rotational motion into electric energy are provided. In addition, some plants are provided with a starting device for starting the gas turbine device and a denitration device for removing nitrogen oxides in exhaust gas discharged from the gas turbine device.

The exhaust heat recovery boiler guides high-temperature exhaust gas discharged from a gas turbine facility in the order of a superheater, an evaporator, and a coal-saving machine, and discharges exhausted exhaust gas from a chimney to the atmosphere. Here, the steam generated by the superheater is sent to a steam turbine device through a pipe. Steam turbine devices are devices that convert the steam generated by the exhaust heat recovery boiler into rotary motion.Some devices are divided into high-pressure turbines, medium-pressure turbines, low-pressure turbines, and other devices. ing. The steam that has finished its work in this steam turbine is returned to water in the condenser, and then sent to the economizer of the waste heat recovery boiler through piping, and the sent water is re-used by the exhaust gas from the gas turbine device. Converted to steam. Rotational movements occur in steam turbine units and gas turbine units, which are converted as electrical energy in a generator. The gas turbine device and the steam turbine device of the combined cycle plant are either connected to separate generators or connected to the same generator. The gas turbine equipment of the present invention can be applied to any of them.

FIG. 9 shows a conventional gas turbine facility.
Intake duct 1 for guiding combustion air to gas turbine device 10
And an intake plenum 2 provided at an air inlet of the gas turbine device 10 and a compressor 3 for compressing air to a required pressure.
The gas turbine 4 that rotates by burning the compressed air and fuel, the exhaust duct 5 that serves as a passage for the exhaust gas burned by the gas turbine 4, and the top table 12 that supports the gas turbine device 10 And a gantry 11 provided for the above. Here, the gantry 11 and the top table 12 are usually formed integrally.

[0006]

In the prior art,
As shown in FIG. 9, since the intake duct 1 is installed in the gantry 11, the lower surface of the top table 12 below the gas turbine device 10 has a combustion temperature equal to the atmospheric temperature flowing through the intake duct 1. Cooled by working air. Especially,
In the case of Japan, the temperature of the atmosphere can be below freezing in winter, and it is exposed to extremely low temperatures. On the other hand, the upper surface of the top table 12 is heated due to heat generated in the gas turbine 4 burning at a high temperature.

[0007] Therefore, in the prior art, since the top and bottom surfaces of the top table 12 of the gantry 11 are heated and cooled, respectively, the top table 12 is deformed by heat. Due to the thermal deformation of the top table 12,
There is a problem that the alignment of the gas turbine rotor is shifted.

Further, the gantry 11 is made of reinforced concrete, and there is a problem that the concrete on the upper surface of the top table 12 is deteriorated by the high-temperature heat generated in the gas turbine 4.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has been made by heat of a gantry, especially a top table.
Deformation is suppressed, and gas turbine rotor alignment is reduced.
The purpose is to prevent this .

[0010]

According to the present invention , a top of a gantry is provided.
A gas turbine device mounted on a table,
An intake duct for supplying air to an intake port of the turbine device,
Exhaust passage for exhausting exhaust gas from the gas turbine device
In the gas turbine equipment comprising:
When a coolant flow path through which the cooling medium passes is formed below the cooling device,
The refrigerant flow path and the intake duct are connected to a top table.
It is characterized by being arranged on the upper and lower surfaces .

[0011]

[0012]

According to the gas turbine equipment of the present invention , as described above,
The coolant flow path through which the cooling medium passes below the gas turbine device
And forming a flow path between the refrigerant passage and the intake duct.
Since it is arranged on the upper and lower sides of the tabletop,
Refrigerant and air flow on the top and bottom sides of the top table
The top table and the lower surface of the top table.
Is cooled and heat generated by the upper and lower sides of the top table.
Deformation can be suppressed, and as a result, the gas turbine
The misalignment of the rotor can be prevented, and the top table made of concrete can be prevented from being deteriorated by heat.

[0013]

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the embodiments shown in the accompanying drawings. FIG. 1 is a schematic sectional side view showing a first embodiment of the present invention. In FIG.
Air used for combustion in the gas turbine device is sent to an intake plenum 2 through an intake duct 1 provided below the gantry 11. The air rectified in the intake plenum 2 is sent to the compressor 3 and guided to the combustor of the gas turbine 4. The combustor burns the pressurized air and the fuel introduced from the combustion system, and converts the compressed air into rotary motion by the gas turbine 4. Exhaust gas after work is exhaust duct 5
Sent to the outside. Here, the gas turbine device 1
Numeral 0 is supported by the gantry 11, and in particular, the top table 12 of the gantry 11 is an important basis for supporting the gas turbine device 10, and the deformation of the top table 12 immediately changes the shape of the gas turbine device 10 and the alignment of the gas turbine rotor. It develops into problems such as misalignment.

As described above, since the combustion air at the same temperature as the atmospheric temperature flows on the lower surface of the top table 12, it is always cooled. On the other hand, the upper surface of the top table 12 is at a considerably high temperature because a combustor for burning to high temperature is installed. As described above, the top table 12 is cooled by air from below, and is heated by the heat of the gas turbine from above, so that thermal deformation is likely to occur.

In the first embodiment shown in FIG. 1, the upper surface of the top table 12 is forcibly cooled by air. In general, the gas turbine device 10 is generally covered with a soundproof enclosure 6 for the purpose of soundproofing. Therefore, a cooling air inlet 20 is provided at one end of the lower part of the soundproof enclosure 6 immediately above the top table 12, and the cooling air is forcibly supplied to the top by a cooling fan 21 provided at the upper part of the soundproof enclosure 6 or separately provided. Table 1
2 Ventilate the top surface. At this time, the rectifying plate 7 is provided in the soundproof enclosure 6 so that the cooling air flows uniformly on the upper surface of the top table 12. The cooling air that has flowed into the soundproof enclosure 6 is forcibly discharged from the cooling air outlet 22 by the cooling fan 21. Thereby, the surface temperature of the top table 12 can be reduced. Immediately
In this embodiment, the lower part of the soundproof enclosure 6 is used.
Section is extended below the gas turbine device 10.
Air flow path arranged on the upper surface side of the top table 12
Is formed in the air flow path from the cooling air inlet 20.
By flowing in and cooling the top table top,
The surface temperature of the table is lowered. Only
The air flowing from the cooling air inlet 20 is
First, the height of the gas turbine device 10 in the
From the gas turbine 4 side, which is a hot part, a relatively low temperature part
Flow to the compressor 3 side
The surface temperature of the table 12 can be reduced efficiently.
And the cooling effect can be improved.

FIG. 2 is a schematic sectional side view showing a second embodiment of the present invention. In the second embodiment shown in FIG. 2, a cooling fan 21 is installed on the top table 12 and cooling air is forcibly sent from a cooling air inlet 20 opened below the soundproof enclosure 6. The sent cooling air is discharged to the outside through a cooling air discharge port 22 provided above the soundproof enclosure 6 via the flow straightening plate 7.

FIGS. 3, 4 and 5 correspond to FIGS. 1 and 2 respectively.
FIG. 6 is a view showing a specific example of the current plate 7 shown in FIG. FIG. 3 (a)
3 shows a plan view of the current plate 7, and FIG. 3B shows a cross-sectional view of the current plate 7. The current plate 7 shown in FIG. 3 includes a large number of circular holes 7a through which cooling air passes.

FIG. 4A is a plan view of the current plate 7.
FIG. 4B shows a sectional view of the current plate 7. The current plate 7 shown in FIG. 4 has a plurality of rectangular holes 7b through which cooling air passes.
Is provided in a state without a step with the guide portion 7c bent downward.

FIG. 5A is a plan view of the current plate 7.
FIG. 5B shows a sectional view of the current plate 7. The current plate 7 shown in FIG. 5 has a plurality of steps,
A plurality of rectangular holes 7d through which cooling air passes are formed in each step portion.

FIG. 6 is a diagram showing a state in which grooves 16 are provided on the surface 15 of the top table 12 in order to increase the cooling effect of the top table 12 of the gantry 11 in the first and second embodiments. is there. By providing the groove 16, the surface area of the top table 12 can be increased, and the cooling effect by the cooling air can be improved. Thereby, in the embodiment shown in FIGS. 1 and 2, the cooling efficiency is greatly improved.

FIG. 7 shows an example in which the cooling effect of the top table 12 is enhanced by embedding a cooling pipe 17 in the upper surface of the top table 12 in the first and second embodiments. In this case, by employing air, water, or the like as the cooling fluid that passes through the cooling pipe 17, the cooling efficiency is dramatically improved. Thus, FIGS. 1 and 2
In the embodiment shown in (1), the cooling efficiency is dramatically improved.

FIG. 8 is a partially sectional side view showing a third embodiment of the present invention. In FIG. 8, the intake duct 1 is formed by forming the tunnel portion 40 in the concrete forming the box-shaped gantry 11. In the third embodiment, by using the intake duct 1 and the gantry 11 together,
This is effective because the cost of the intake duct 1 and the space of the tunnel section 40 can be reduced.

However, as the air supplied to the gas turbine device 10, it is necessary to remove impurities, dust and the like in the air. On the other hand, since the intake duct 1 made only of concrete has a risk of concrete peeling off or the like, it is inappropriate to use the intake duct in the gas turbine device as it is in the concrete state. Further, since air having the same temperature as the atmospheric temperature flows in the intake duct 1, it is necessary to prevent cooling by air. Therefore, the purpose of preventing peeling of the concrete surface,
In addition, for the purpose of heat insulation and heat insulation for preventing cooling of the lower surface of the top table 12 by air, it is necessary to provide the inner layer 30 with a SUS material, another steel material, a paint, a heat insulation material or the like in the tunnel portion 40.

The output of the gas turbine device 10 depends on the temperature of the combustion air. The output increases when the temperature of the air is low, and decreases when the temperature of the air increases. Therefore,
Heating the lower surface of the top table 12 to have the same high temperature as the upper surface of the top table 12 to prevent deformation of the top table 12 is not appropriate because the temperature of air sent to the gas turbine device is increased, Can not be adopted.

Further, as shown in FIG. 8, the upper surface of the top table 12 may be insulated by a heat insulating material 25 to block heat from the gas turbine device 10. Thus, heat from the gas turbine device 10 is insulated by the heat insulating material 25 and does not affect the top table 12.

As described above, the embodiments in which the upper surface of the top table 12 is cooled and insulated and the lower surface is insulated and kept warm are described with reference to FIGS. 1, 2 and 8, respectively. There is an effect even when used alone, but a further effect can be obtained by combining a plurality of things.

[0028]

According to the present invention, a top table of a gantry is provided.
The upper and lower sides of the
Heat from the table, especially the top table gas turbine
To reduce the shape to concrete that composes the top table
Of the gas turbine
This has the effect of preventing misalignment of the data.

[0029]

[Brief description of the drawings]

FIG. 1 is a schematic sectional side view showing a first embodiment of the present invention.

FIG. 2 is a schematic cross-sectional side view showing a second embodiment of the present invention.

FIGS. 3A and 3B are diagrams showing a specific example of the current plate shown in FIGS. 1 and 2, wherein FIG. 3A is a plan view and FIG.

4A and 4B are diagrams showing a specific example of the current plate shown in FIGS. 1 and 2, wherein FIG. 4A is a plan view and FIG.

5A and 5B are diagrams showing a specific example of the current plate shown in FIGS. 1 and 2, wherein FIG. 5A is a plan view and FIG.

FIG. 6 is a perspective view showing a state in which grooves are provided on the surface of the top table in the first and second embodiments.

FIG. 7 is a perspective view showing a state in which a cooling pipe is embedded in an upper surface of a top table in the first and second embodiments.

FIG. 8 is a partial cross-sectional side view showing a third embodiment of the present invention.

FIG. 9 is a sectional side view showing a conventional gas turbine facility.

[Explanation of symbols]

1; intake duct, 2; intake plenum, 3; compressor, 4;
Gas turbine, 5; exhaust duct, 6; soundproof enclosure, 7; current plate, 10; gas turbine device, 11; gantry, 12; top table, 15; surface of top table, 16; groove, 17; ; Cooling air inlet, 2
1; cooling fan, 22; cooling air exhaust port, 25; heat insulating material, 30;

Continuation of the front page (56) References JP-A-4-187830 (JP, A) JP-A-3-210029 (JP, A) Japanese Utility Model Application No. 50-53951 (JP, U) Japanese Utility Model Application No. Sho 63-183344 (JP , U) Real opening 63-82036 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F02C 7/18 F02C 7/04 F02C 7/20 F02C 7/24

Claims (2)

(57) [Claims] 1. A gas machine mounted on a top table of a gantry.
Air at the intake of the gas turbine device and the gas turbine device.
And an intake duct for supplying air from the gas turbine device.
Gas turbine equipment provided with an exhaust passage for exhausting exhaust gas
A cooling medium passes below the gas turbine device.
A refrigerant flow path, and the refrigerant flow path and the intake air.
Place the duct and the top and bottom sides of the top table respectively.
Gas turbine installation, characterized in Rukoto. 2. A gas machine mounted on a top table of a gantry.
Air at the intake of the gas turbine device and the gas turbine device.
And an intake duct for supplying air from the gas turbine device.
Gas turbine equipment provided with an exhaust passage for exhausting exhaust gas
A flow of a cooling medium below the gas turbine device.
Forming a refrigerant flow passage, and the refrigerant flow passage and the intake air.
Ducts are placed on the top and bottom sides of the top table respectively
In the refrigerant passage, the refrigerant constitutes a gas turbine device.
Flow from the gas turbine side to the compressor side.
Gas turbine equipment characterized by having been formed.